固废材料磷石膏的工程特性研究

本文从探究磷石膏含水率在不同温度下的变化规律;参考《公路土工试验规程》(JTG E40-2007)中的试验方法,研究磷石膏的物理力学性质,测定磷石膏的液塑限、最大干密度、最佳含水率、比重等物理参数,开展不同压实度下磷石膏的渗透试验、压缩试验、三轴剪切试验等,对磷石膏的工程特性进行分析评价。结果表明:磷石膏物理力学特性类似于土类,但磷石膏的结构和土不同,磷石膏是规则的板状晶体结构,主要成分是CaSO4·2HO2。总体分析磷石膏是一种良好的工程材料,工程应用中控制和掌握好磷石膏含水率,尽可能的提高磷石膏的压实度,压实度越大,磷石膏的工程性质越好。

Study on Engineering Characteristics of Solid Waste Material Phosphogypsum

In this paper,the change of the water content of phosphogypsum at different temperatures is explored;the physical and mechanical properties of phosphogypsum are determined by referring to the test methods in Highway Engineering Test Regulations for Highway(JTG E40-2007),and the liquid-plastic limit of phosphogypsum,Maximum dry density,optimal moisture content,specific gravity and other physical parameters,carry out phosphogypsum penetration tests,compression tests,triaxial shear tests,etc.under different degrees of compaction to analyze and evaluate the engineering characteristics of phosphogypsum.The results show that the physical and mechanical properties of phosphogypsum are similar to those of soil,but the structure of phosphogypsum is different from that of soil.Phosphogypsum has a regular plate-like crystal structure,and its main component is CaSO4·2 HO2.Overall analysis Phosphogypsum is a good engineering material.Control and master the moisture content of phosphogypsum in engineering applications,and increase the compaction degree of phosphogypsum as much as possible.The greater the compaction degree,the better the engineering properties of phosphogypsum.